I wouldn’t want to say Joseph is right but your perception is indeed incorrect. If they have smartphones, which I think they are not supposed to, they would need to be ‘tagged’. Maybe you confused “…that filtering wouldn’t be expected of them” with “…that filtering wouldn’t be requested of them…because they wouldn’t think to do otherwise”
I do know my son’s friend who is there was not allowed a smart phone and only this year was allowed a kosher phone.
I am mildly uncomfortable with your willingness to speak this way about any group that you know you may be wrong about. Not quite like you…..